How to draw a regular heptagon knowing the length of one side

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How to construct a regular heptagon given the measurement of one of its side, using a compass and a 30-60º set-square
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This RU-vid channel is dedicated to teaching people how to improve their technical drawing skills. It focusses on drawing figures from the geometric plane to descriptive geometry and also different systems of technical drawing representation.
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Dubbed by Frank Shaw.
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#Geometry #HowtoDraw

Опубликовано:

15 сен 2024

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Комментарии : 68

@kevinmeade10 4 года назад

To clear up some confusion; this specific method is NOT a way to construct a heptagon. The author should have included the comment that it is "almost" a heptagon. This method is an approximation method. The last side will be slightly different in length due to this approximation. This method is the standard way to "approximate" the heptagon.

@adamlau9274 2 года назад

I agree with you. The author never actually showed us the imterior angles to prove it was a perfect polygon.

@TheCompleteGuitarist 4 года назад

Thanks, this worked great. I am creating real 3D paper prisms and this will help me create the base. With a 35mm side I produced a heptagon using very crude protractor and a HB pencil with was less than .5mm discrepancy. A tolerance more than adequate for my needs especially on such a tiny scale and even with the discrepancy I can build that into my construction, aside from which, observing any such error is impossible to the naked eye.

@danyjade7094 5 лет назад

Thanks it helped me for my Designed and Communication Homework

@mehak___yyyy9726 2 года назад

Thank you, it helped me a lot

@limshinying6719 3 года назад

why we need to draw a 30 degree and an arc AN to meet with the perpendicular line of AB to get the centre? can help to explain? thank you so much

@gft1740 Год назад

Thanks a lot it really helped😊😊

@sandesh6651 5 лет назад

Thank you. Please keep up the good work

@akaahar_ava5893 Год назад

Thanks sir

@cpjhala 6 лет назад

Lots of thanks

@rebeccakumar9468 4 года назад

Yes

@johndeerbolonias9731 Год назад

This video was helpful. However, you should include how and where does the measure came from so that it's more clear, especially to us students who doesn't have any idea how to do this

@True_DiabloTempest 4 года назад

Thx it really help for my homework

@_ADL650_ 4 года назад

thank you so much

@akaahar_ava5893 Год назад

Please my circle is not touching both points only one point,I mean point A and B

@justingoldson1041 6 лет назад

Thank u, it helped a lot 😊😊

@Eggzzzo 4 года назад

Thanks a lot!!! It really helped me.☺

@programmingtutor7915 10 месяцев назад

Gauss-Wantzel prove that Heptagon is not constructible polygon since 17xx , this is just approximation , not Exactly heptagon.

@piyumikanimasha7 2 года назад

Thank you soo much😍😍

@syadazulaika 3 года назад

Thank you so helpfull

@Chiniituluu 5 месяцев назад

This heptagon is wrong. Because of Galois Theory, there is impossible to make perfect heptogon by using compass and ruler.

@ArthurGeometry 4 месяца назад

It's a pretty valid approximation if you draw it by hand.

@omarsamman6909 2 года назад

Good morning> I have a question please explan the use of 30 deg angle

@ManuelGarcia-yw2cf 4 года назад

Make it easier, here you have some siberian children doing their homework from school

@iplaygames6691 3 года назад

and you have malaysian kids too

@vhyctorEhkx 7 лет назад

thanks a lot

@faiyah_520 4 года назад

Thank you💞💞

@ojosephlocheret250 2 года назад

What is that measurements one side

@69420guyhaha Год назад

nice but heptagon is unconstructable but it can be constructed by neusis

@HACKINGMADEFUN 5 лет назад

Is this the general method

@witcherthree1381 5 лет назад

Can you do it without the protractor (just a compass and straight edge?

@bimffies 5 лет назад

Nope, soz: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-O1sPvUr0YC0.html

@declanboushy6838 5 лет назад

Unfortunately not. Every regular polygon with a prime number of sides is not constructable with only a compass and straight edge unless its number of sides is equal to a fermat prime. A fermat prime is a prime number in the form of 2 to the power of 2 to the power of "n" (insert non-negative whole number here), such as 3, 5, 17, 257, 65537... In fact, these 5 aforementioned fermat primes are the ONLY ONES known to humanity as of now. The proof of the impossibility of the construction of a heptagon just using a compass and straight edge is part of the Gauss-Wantzel theorem. For more info: Wikipedia - Constructible Polygon God Bless

@declanboushy6838 5 лет назад

By the way, the construction in the video is a very close approximation, but not exact.

@InnocentOne933 3 года назад

Ye it is possible cuz it is 30° degree. So you just need to make a 60° degree angle and just divide by 2 so you will get 30° degree angle.

@GeometricMason 2 года назад

@@InnocentOne933 exactly. Using a protractor is cheating

@gurbaken5793 2 года назад

They slightly error when drawing

@carl1592 5 лет назад

i guess most are here because of there lesson? on how to make a specific polygon? and forgot how to make them so decided to watch here? lmao it also helped an all of my polygon creating lessons xd

@michaelumeh8357 2 года назад

Thank you But why 30 degrees?

@rebeccakumar9468 4 года назад

I am trying to make now

@hrishardhgaming8391 3 года назад

What is the length of the side line

@Jd_c.l.u.b 3 года назад

I like that

@qinen1973 4 года назад

Not specific enough

@angelhenry2069 Год назад

How do you know how big to open the compass at 2:15

@gmine5646 6 месяцев назад

exactlyyyyyyyy

@mariolegaspi681 Год назад

I TRIED IT 5 TIMES, BUT I'M ALWAYS OFF A FEW mm.

@sadinsikder6076 Год назад

I also tried it 7 times but it didn't work

@kevinkudakwaishemaminimini9996 4 года назад

thank you it helped a lot

@RhealRPoirier 4 года назад

Is there a proof of why this works somewhere?

@georgesl.ashley5643 6 лет назад

helpful

@ARC928 4 года назад

Is this mathematically accurate?

@richardcarrington4840 5 лет назад

Equilateral

@TheRojo387 4 года назад

I call your bluff!

@angelhenry2069 Год назад

I got a hexagon 😭

@arsantiqua8741 6 лет назад

Is this approximate?

@ArthurGeometry 6 лет назад

Yes, it is

@shakediawilson9891 7 лет назад

BAJAN WHAT ARE YOU DOING

@Pushpendrasingh-fh4cp 3 года назад

What is method

@InnocentOne933 3 года назад

This is smort

@menkasingh4424 4 года назад

Not sure yet !!!🙄🙄

@shizamalik9220 6 лет назад

mujhy pata ni chl rha h k u ny compus kini open ki h

@calvinjackson8110 Год назад

The video gives you the impression that it is this easy to construct a perfect heptagon. The constructed arcs and lengths look so precise and perfect. BUT THEY ARE NOT. You have not created a perfect heptagon. Readers should do some independent research about regular polygons that are not constructable.